Road grader



Patented Apr. 13, 1937 UNITED ySTATES PATENT OFFICEV Application November 6, 1936, Serial No. 109,410

n In Canada November 5,1935

claims. (C1. 37-156) The invention appertains to road lgrading apparatus and4 particularly to an appliance attached to the chassis of a motor truck in order to convert it into agrader.

5 'Ifhe object vof the invention is to produce a "grading appliance incorporating a turntable that .enables vthe scraper blade to be readily adjusted to change the transverse angle and yet accommodate unequal lowering or raising of the blade.

The structure provides for compound movement of the blade to suit various working conditions and the manner of performing the grading work. The turntable permits the blade to swing in a substantially horizontal plane so that l5 it may be set to a suitable angle to the roadway to be graded. The turntable is so mounted and guided beneath the chassis that it can be lowered uniformly by fluid cylinders -to bring the blade down evenly, or if required the turntable may be transversely tilted in order to depress one end of the blade to a greater extent than the other end.

The turntable is khitched to the chassis by a forwardly extending draft member and guided `byrearwardly extending arms operably disposed `40 sponding parts in each of the figures through- A out the drawing of the invention.

i The'drawing is illustrative of one practical `:application of the invention in which the reference numeral 5 denotes the usual chassis of a +15 motor truck.

' A transverse drawbar 6 is attached to thechassis so as to be suspended rigidly beneath the same. A rearwardly extending draft member 'l Vis. connected at its forward end to the drawbar '-50 medially of the width of the chassis. The connection may consist of a shank 8 of the draft Y member which is lodged in a hole in the drawbar .with a nut 9 or other shoulder-forming element on the outer end of the shank. The hole is large -155...enough .to permit the rearend of the draft groove. provides for circular movement of the outer ring member to have movement in substantially a ver- Y l tical plane. The draft member may be cush- Vioned bya spring l0. This swivel connection is given by way of preference but not of limitation.

The draft member is shown as composed of a 5 pair of -diverging membershaving their rear portions integral with plates Il, Il having rearwardly extending larms I2, l2. The arms are provided with headed pins |23 lodged .in vertical slots I 4 of depending guidebars L5. The guidebars -10 are pivoted to the chassis at .i6 .independing relation Iin order to .accommodate the Varcuate movement of the Yarms when lowered andraised in relation to the swivel connection of the draft member. f .l5 Outwardly disposed brackets 4Il are secured to the plates in order to serve as attaching-means for tension springs I8 and iiuid cylindersfli which are suspended'from the brackets r20 carried by the chassis. The springs support the V420 Weight ofthe movable grader structure andnormally retain it in the .elevated position shown in Figure 1. n y Y The cylinders are swivelly connected to the brackets Il and20, andhaveI pistons operated by ,.25 fluid under pressure by which eitherof the brackets I'l -may be urged downwardly against the spring pressure. The cylinders have independent controls which may be operated concurrently or individually as occasion requires. The conl trol mechanismof the cylinders is not shown since itis of known construction.

The turntable is carried by the plates Il and consists of an inner ring .2l and an `outer ring 22 intertted by a, tonguey and` groove V2li .which ,35

.enables one ring to turn with respect to the p other without displacement.

.fixed to said plates at the under side thereof,4

The inner ring is while theouter ringv rotatably bears against the under sideof the `plates in order to retainv thek 40 intertting engagement of the tongue and 5 It will be evident that the `,construction about a substantially vertical axis. The rean portions of therings may be bent downwardly as at 24 to give` suflicient clearancey for the propeller shaft of vthe motor. truck, `however this is only a matter of construction and does not con- .cern `the invention.

Means are provided to lock the outer ringin various angular positions, which means may consist of a circular arrangement of [spaced holes vin the outer ring 22 as at 25, and pegs as at 26 removablyginserted in the plates ll1for selective engagement. .in the holes 25. 4'5

The outer or rotatable ring carries the scraper blade 30 by means of the hanger 21, which may be integral or secured to this range. The blade transversely extends beneath the turntable and is pivoted to the depending end members 28 of the hanger. These end members carry a known type of mechanism, denoted at 29, for regulating the scraping angle of the blade.

It willbe manifest that by this construction the blade can be swung about the vertical axis of the rotatable ring 22 in order to assume any desired angular position. When once the blade has been set to a particular position, the pegs 26 lock this ring against turning movement. TheY .raising of the blade.

What I claim is: l. A road grader composed of a wheeled frame, a turntableV substantially horizontally disposed thereunder incorporating a non-rotatable member and a rotatable member, a transverse drawbar depending from the frame in advance of the turntable, a draft member forwardly extending from the non-rotatable member aforesaid and swivelly connected to the drawbar in longitudinal alignment with the centre of the turntable, the swivel connection being such as to permit a uni-k versal movementof the turntable, a transverse hanger submounted on the rotatable member aforsaid, a scraper blade carried thereby,a pair of'spaced arms rearwardly extending from said non-rotatable member, depending bars spaced correspondingly to the spacing of said arms, the upper ends of said bars being pivoted to the aforesaid frame to swing forwardly and rearwardly thereof, the depending extent of the bars having a lateral thrust-sustaining connection with the distal ends of the respective arms whereby the arms have unhampered vertical movement on the bars, and means carried by the aforesaid frame for raising, lowering, or transversely tilting the turntable relative thereto.V

` v 2. A road grader composed of a wheeled frame, a turntable substantially horizontally disposed thereunder incorporating a non-rotatable member and a relatively rotatable member, means for,

securing the rotatable member in angular` adjustment, a transverse drawbar depending from the frame in advance of the turntable, a draft member forwardly extending from the non-ro-V tatable member aforesaid and swivellygconnected to the drawbar in longitudinal alignment with the centre of the turntable, the swivel connection being such as to permit a universal movement of the turntable, a transverse hanger submounted on the rotatable member aforesaid, a scraper yblade carried thereby, a pair of spaced arms rearwardly extending from said non-rotatable member, depending bars spaced correspondingly Y to the spacing of said arms, the upper ends of said bars being pivoted to the aforesaid frame to swing forwardly and rearwardly thereof, the depending extent of the bars having a lateral thrust-'sustaining connection with the distal ends aovaee of the respective armswherebythe arms have urhampered vertical movement on the bars, and

means carried by the aforesaid framel for raising, lowering, or `transversely tilting the turntable relative thereto. l

3. A road grader composed of a wheeled frame, a turntable substantially horizontally disposed thereunder incorporating a non-rotatable member and arelatively rotatable member having a circular series of holes therein, a pegdetachably carried by the non-rotatable'member for selective `insertion in the holes of the rotatable member to secure it in angular adjustment, a transverse drawbar depending from the frame inadvance of the turntable,a draft member forwardly ex- Ytending from the non-rotatable member'afore- Vsaid and swivelly connected tothe drawbar in longitudinal alignment with .the centre of the. turntable, -theswivel-connectionr being such as to permit a universal movement of theV turntable, a

transverse,hanger-submounted on'the rotatable ,member aforesaid, a scraper blade carried there;

by, a pair of spaced arms rearwardly extending from said non-rotatable member, depending bars spaced correspondingly to Vthe vspacing 1 of said arms, the upper ends of said bars being pivoted to the aforesaid Vframe to vswing forwardly and rearwardly thereof, the depending extent of the bars having a lateral thrust-sustaining connection with the distal ends of the respective arms whereby the arms have unhampered Yvertical movemet on the bars, and means carried by the aforesaid frame for raising, lowering, or trans# versely tilting the turntable relative thereto.

4. A road grader composed of a wheeled frame, a turntable substantially. horizontally disposed thereunder incorporating a non-rotatable mem.-

ber and a rotatable member, a transverse draw? bar depending from the frame in advance of th`e turntable, a draft member forwardly extendingfrom the non-rotatable member aforesaid and swivelly connected to the drawbar in longitudinal alignment withthe centre of the turntable, the swivel connection being such as to permit a versal movement of the turntable, a transverse hanger submounted on the rotatable memberV versely tilting the ,turntable relative thereto.

5. A road grader -composedof a wheeled frame,

a turntable substantially horizontally disposed thereunder incorporating a non-rotatable ,mem-

ber land a rotatable member, a transverse draw- Y bar depending from the frame inadvance 1 eff '65 the turntable, a draft member forwardly-extending from the non-rotatable member aforesaid and swivelly connected to the drawbar in longi-V tudinal alignment` with the centre of the turntable, the swivel connection being such as to permit a universal movement ofthe turntablefa transverse hanger submounted on the rotatable member aforesaid, a scraper blade carried thereby, a pair of spaced arms rearwardly extending from said non-rotatable member, .dependingbarsl'l spaced correspondingly to the spacing of said arms, the upper ends of said bars being pivoted to the aforesaid frame to swing forwardly and rearwardly thereof, the depending extent of the bars having a lateral thrust-sustaining connection With the distal ends of the respective arms whereby the arms have unhampered vertical movement on the bars, coilspring means carried by the aforesaid frame for sustaining the weight of the turntable and the attachedV elements and vertical uid cylinders connected to the opposite sides of the turntable and having pistons therein connected to the frame for raising, lowering, or transversely tilting the turntable relative to the frame.

JOHN A. DICKEY. 

